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| author | Dillon Amburgey <dillona@dillona.com> | 2013-02-02 18:04:48 -0500 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2013-03-11 13:05:08 +0200 |
| commit | f2b79ce9dc65753c6833921dd5ef6fa59632851f (patch) | |
| tree | d3c0b956078d10f12bec9c1d00577f494be6a29f /linux-user/syscall.c | |
| parent | bfb669f39f2ecd854992924ced20b00163509043 (diff) | |
| download | focaccia-qemu-f2b79ce9dc65753c6833921dd5ef6fa59632851f.tar.gz focaccia-qemu-f2b79ce9dc65753c6833921dd5ef6fa59632851f.zip | |
linux-user: Support setgroups syscall with no groups
Signed-off-by: Dillon Amburgey <dillona@dillona.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index c7fcfc02c6..1729446840 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -7680,18 +7680,20 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, { int gidsetsize = arg1; target_id *target_grouplist; - gid_t *grouplist; + gid_t *grouplist = NULL; int i; - - grouplist = alloca(gidsetsize * sizeof(gid_t)); - target_grouplist = lock_user(VERIFY_READ, arg2, gidsetsize * 2, 1); - if (!target_grouplist) { - ret = -TARGET_EFAULT; - goto fail; + if (gidsetsize) { + grouplist = alloca(gidsetsize * sizeof(gid_t)); + target_grouplist = lock_user(VERIFY_READ, arg2, gidsetsize * 2, 1); + if (!target_grouplist) { + ret = -TARGET_EFAULT; + goto fail; + } + for (i = 0; i < gidsetsize; i++) { + grouplist[i] = low2highgid(tswapid(target_grouplist[i])); + } + unlock_user(target_grouplist, arg2, 0); } - for(i = 0;i < gidsetsize; i++) - grouplist[i] = low2highgid(tswapid(target_grouplist[i])); - unlock_user(target_grouplist, arg2, 0); ret = get_errno(setgroups(gidsetsize, grouplist)); } break; |